Thanks Woodster. I hope my pond will be ok if I don't aerate in the next few years. I'm going to have to retire to get the time to put something like that together. I still don't understand why the aeration supply companies want 7 or 8 thousand dollars for a solar aeration system. I will need to educate myself first.
Thanks again.

9 yr old pond, 1 ac, 15' deep.
RES, YP, GS, FHM (no longer), HBG (going away), SMB, and HSB (only one seen in 5 yrs) Restocked HSB (2020) Have seen one of these.
I think that's about all I should put in my little pond.
Otter attack in 2023